|1 4 8 | |p1| 26
|5 7 0 | |p2| = 38
|8 12 2 | |p3| 66
The determinant=
1*[7*2] - [12*0]=14
-4*[5*2] - [8*0]=-40
8*[5*12] - [7*8]= 32
14--40-32=22
I found the determinant to be 22 so I'm hoping that part was right.Then i moved on to finding each cofactor-
| 7 0| |5 0|...
I've only been taught the inversion method so that's what I usually use, I tried with cramers rule but still couldn't seem to get it right, could you show me using inversion? :)
Hopefully someone can help me solve this, I'm usually quite good at matrix algebra but for some reason I cannot solve this equation.
p1+4p2+8p3=26
5p1+7p2=38
8P1+12p2+2p3=66
If somebody could help me with the values of p1 p2 p3 that would be a great help :)